The serial number is on your phone's back, in Settings, or on your original box

Your iPhone's serial number is a unique identifier that Apple uses to track your device. You can find it in three places: printed on the back of your phone (on older models), in the Settings app under About, or on the original box and receipt. The serial number looks like a string of letters and numbers — for example, F2CTN02HP0D7 — and is different from your IMEI or phone number.

The easiest route depends on your iPhone model and whether you still have the original packaging. If your phone is newer than an iPhone XS, the serial number is no longer printed on the back, so you'll need to check Settings or your paperwork instead.

Key Takeaways

  • iPhone XS and newer models do not have the serial number printed on the back; you must check Settings or your original box.
  • In Settings, go to General, then About, and scroll to find the serial number listed there.
  • Your original iPhone box, receipt, and Apple ID account all display your serial number if you need to reference it later.
  • The serial number is different from your IMEI, phone number, and Apple ID — do not confuse them when contacting support.

Finding the serial number in Settings on any iPhone

Open the Settings app and tap General. Scroll down and tap About. The serial number appears in the list — it is labeled "Serial Number" and is usually near the top, above the IMEI and ICCID numbers.

This method works on every iPhone model, regardless of age or whether the back of your phone is damaged. If you cannot access your phone, this route is not available, but you can use your original box or contact Apple with your phone number instead.

Checking the back of your iPhone (iPhone XR, XS, and older)

If you have an iPhone XR, iPhone XS, or any model older than those, the serial number is printed on the back of the phone in small text. Look near the bottom of the back panel — you may need good lighting or a magnifying glass to read it clearly.

The serial number on the back is permanent and does not change, but it can become hard to read if the back is scratched or worn. If you cannot make out the number, Settings or your original box are more reliable sources.

Finding it on your original box and paperwork

Your iPhone box prints the serial number on the outside, usually on a label on the bottom or back. The receipt from your purchase also lists it. If you no longer have the box, check your email for a receipt from Apple or your carrier — many retailers send digital receipts that include the serial number.

Keep in mind that if you bought your phone used or refurbished, the serial number on the box may not match the phone inside. In that case, Settings is the most reliable source.

Viewing your serial number through your Apple ID

Sign in to your Apple ID account at appleid.apple.com. Go to Devices and select your iPhone from the list. The serial number appears on the device details page, along with the model, storage capacity, and phone number.

This method requires you to remember your Apple ID password and have internet access, but it works even if your phone is lost, stolen, or not in your hands. It is also useful if you need to prove ownership to Apple Support.

Why you might need your serial number

Apple Support uses your serial number to look up your warranty status, service history, and whether your phone is may be able to access for repairs or replacements. If you are selling your phone, the buyer may ask for it to verify the device is legitimate and not stolen. Your insurance company may also request it when you file a claim.

The serial number is not sensitive information in the way a password is — you can share it with Apple, your insurance company, or a buyer without risk. However, do not post it publicly online, as it could be used to impersonate your device in a support chat.

Serial number versus IMEI, phone number, and Apple ID

Your serial number, IMEI, phone number, and Apple ID are four different identifiers, and support staff will ask for the right one depending on what they need to look up. The serial number is what Apple uses internally. The IMEI is what your carrier uses to identify your phone on their network. Your phone number is how people call you. Your Apple ID is your account login.

When you contact Apple Support, they usually ask for your serial number first. If they ask for your IMEI instead, you can find it in the same Settings > General > About menu — it is listed right below the serial number. Do not give out your phone number or Apple ID password unless support asks for them specifically.

Frequently Asked Questions

What if I cannot find my serial number anywhere?

Contact Apple Support with your phone number or the email address linked to your Apple ID. They can look up your device information in their system without needing the serial number first. If your phone is lost or stolen, Apple can also help you remotely lock or erase it.

Is the serial number the same as the IMEI?

No. The serial number is a 12-character code Apple uses internally. The IMEI is a 15-digit number your carrier uses. Both are listed in Settings > General > About, but they are different identifiers for different purposes.

Can I change my iPhone's serial number?

No. The serial number is hardcoded into your phone's hardware and cannot be changed without replacing the logic board. If someone claims they can change it, they are either lying or describing an illegal modification.

Do I need my serial number to set up a new iPhone?

No. You need your Apple ID and password to set up a new iPhone and restore your data. The serial number is only needed if you are contacting support, filing a warranty claim, or selling the phone.